[C:1]([CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][C:8]([NH:10][CH2:11][C:12]([OH:14])=[O:13])=[O:9])#[N:2].[OH-].[Na+].Cl.[Cl-].[Na+]>C(O)C.[Ni]>[NH2:2][CH2:1][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][C:8]([NH:10][CH2:11][C:12]([OH:14])=[O:13])=[O:9]8.2 g (41.4·10-3 mol) of N-(6-cyanohexanoyl)-glycine are dissolved in 100 ml of ethanol, and 60 ml of 1M sodium hydroxide solution and 800 mg of Raney nickel are added. The mixture is then stirred under a hydrogen atmosphere, at room temperature and under a pressure of 3.5·105Pa, for 8 hours. When the reaction has ended, 20 ml of 1M hydrochloric acid are added and the mixture is concentrated under reduced pressure to give 10.2 g of a white pasty solid, which contains the expected salt and sodium chloride and which can be used without further purification in the next step.
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